* language.h (language_defn): new field, la_word_break_characters.
* language.c (unknown_language_defn): Set new field to
default_word_break_characters.
(auto_language_defn): Likewise.
(local_language_defn): Likewise.
* ada-lang.c (ada_language_defn): Likewise.
* c-lang.c (c_language_defn): Likewise.
(cplus_language_defn): Likewise.
(asm_language_defn): Likewise.
(minimal_language_defn): Likewise.
* f-lang.c (f_language_defn): Likewise.
* jv-lang.c (java_language_defn): Likewise.
* m2-lang.c (m2_language_defn): Likewise.
* objc-lang.c (objc_language_defn): Likewise.
* p-lang.c (pascal_language_defn): Likewise.
* scm-lang.c (scm_language_defn): Likewise.